includes(
        "Petzold01_GetStarted/1.3.2. HelloMsg", 
        "Petzold02_Unicode/2.3.5. ScrnSize",
        "Petzold03_Windows/3.1.2. HelloWin",
        "Petzold03_Windows/KWin_HelloWin",
        "Petzold04_TextOut/4.2.10. SysMets1",
        "Petzold04_TextOut/4.3.3. SysMets2",
        "Petzold04_TextOut/KWin_SysMets1",
        "Petzold04_TextOut/KWin_SysMets2",
        "Petzold17_Fonts/PickFont"
)